Refactor the project admin screen into tabs

Before we start adding more data to display on the project admin
screen I'm splitting its UI up into tabs, so that we can hang the
new information off of new tabs.  This reduces the total amount
of vertical screen space needed for display, especially by hiding
information that isn't very commonly accessed.

Signed-off-by: Shawn O. Pearce <sop@google.com>
7 files changed